Device for tightening screw connections
a screw connection and screw technology, applied in the direction of wind energy generation, wind motor assembly, construction, etc., can solve the problems of screw connection that is to be tightened next, not always error-free, and the position determination is not always reliabl
Active Publication Date: 2021-10-19
HOHMANN JORG +1
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Benefits of technology
The invention is a tool carrier for a screw connection machine that has lateral guidance to prevent the carriage from deviating from its intended travel line. The guidance is achieved by rigidly attached alignment elements on which there is formed an alignment surface that can be supported on the rear sides of the exposed threaded end portions of the screw connections. It is advantageous if a roller that bears a particularly large amount of weight is a driven roller. To simplify the centring of the tool in relation to the screw connection axis of the respective screw connection, a further refinement proposes a clutch, preferably an electromagnetic clutch, between the driven roller and the drive motor of the traction drive which drives the roller. This allows the vehicle to move freely and with low friction in a direction of travel, and the resulting play simplifies the centring of the tool on the screw connection axis of the respective screw connection.
Problems solved by technology
This type of position determination is also not always error-free, because structures not belonging to the screw connection can influence the sensor signal, with the risk that the screw connection that is to be tightened next not being reliably found.
Method used
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Embodiment Construction
[0054]The device for tightening screw connections is made up of a mobile unit 1, of a spatially separately arranged static unit 2, and of a cable line, in particular a supply and signal cable 3, between the mobile unit 1 and the static unit 2. A constituent part of the mobile unit 1 is a tool 5 for tightening screw connections. In the exemplary embodiment described in more detail here, the tool is a hydraulically operated screw-tensioning cylinder 5. The energy supply of the device is situated in the static unit 2. A further constituent part of the static unit 2 is an electronic control unit 4, which in turn comprises inter alia a travel control module 4A and a documentation module 4B. In the documentation module 4B, a data set is stored for each individual tightened screw connection, which data set thus permits a later check of the most important characteristic data of the screw connection process.
[0055]The tool 5 is arranged in height-adjustable fashion on a carriage 6 which is mo...
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A device for tightening a screw connection on a flange connection is provided with a tool carrier movable along the flange connection and provided with a traction drive. A tool is arranged on the tool carrier for tightening the screw connection and rotating the nut relative to the flange connection. A control unit is provided for moving the tool carrier in longitudinal direction of the tool carrier into a working position by traction drive control signals. In the working position, the tool is opposite the screw connection to be tightened. The control unit performs, by tool control signals, tightening of the screw connection and rotating of the nut. The control unit has a travel control module with travel controller for moving the tool carrier into the working position. The travel controller stops the traction drive after a predefined travel length has been reached that is a target variable.
Description
BACKGROUND OF THE INVENTION[0001]The invention relates to a device for tightening screw connections which are arranged along a flange connection which surrounds, in ring-shaped form, a space and preferably the interior of the tower of a wind turbine, and of which each screw connection is made up of a threaded element and a nut screwed onto the threaded element, and the nut is supported against the flange connection, wherein the device has:[0002]a tool carrier which is movable along the flange connection and which is equipped with a preferably electric traction drive,[0003]a tool which is arranged on the tool carrier and which serves for tightening the screw connection and rotating the nut relative to the flange connection,[0004]a control unit which is designed to, by means of traction drive control signals, move the tool carrier into a working position in which the tool is situated opposite the screw connection that is respectively to be tightened, and to control the tightening of t...
Claims
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IPC IPC(8): B23P19/06E04H12/08F03D13/10F03D13/20B25B29/02
CPCB23P19/067B25B29/02E04H12/085F03D13/10F03D13/20Y02E10/728Y02E10/72
Inventor HOHMANN, JÖRGHOHMANN, FRANK
Owner HOHMANN JORG